You can put this solution on YOUR website! I suspect there was a diagram that accompanied this problem, because you left out some rather important details. First, is this a right triangle? And, if it is a right triangle, is side 1 one of the legs or is it the hypotenuse?
Assumption 1: It is a right triangle and x is one of the legs:
Assumption 2: It is a right triangle and x is the hypotenuse:
Assumption 3: It is NOT a right triangle:
All you can say is that , excluding the two values calculated above.
Hope this helps. And do be a little more specific next time you ask for help.